Dispersion mills



July 16, 1957 E. HANHAUSEN 2,

DISPERSION MILLS Filed Oct. 25. 1954 3 Sheets-Sheet 1 FIG. 2

FIG. I

l INVENTOR. ERN ESTO HANHAUSEN yap- A TTORNE Y July 16, 1957 E.HANHAUSEN DISPERSION MILLS 3 Sheets-Sheet Filed Oct. 25. 1954 ERNESTOHANl-fX l j S N ATTORNEY E. HANHAUSEN DISPERSION MILLS July 16 1957 3Sheets-Sheet 3 Filed Oct. 25. 1954 Fl G INVENTOR. ERNESTO HANHAUS ENATTORNEY United States Patent DISPERSION MILLS Ernesto Hanhausen, MexicoCity, Mexico Application October 25, 1954, Serial No. 464,475

2 Claims. (Cl. 259-43) My invention consists in a new and usefulimprovement in dispersion mills and is designed to provide a capacityreduction tank removably mounted in the tank of 'a conventionaldispersion mill. The conventional dispersion mill operates in thewell-known manner as follows: the material to be dispersed is placed inthe mill tank and the action of a rotor against a stator does thedispersing. The dispersed material is dumped from the tank through adischarge valve. This type of equipment was introduced to the marketsome years ago and has shown an outstanding performance in the paint andchemical industries. The major drawback of this type of mill is thelimitation of load capacity. For example in one model of this mill themaximum capacity is approximately four hundred kilograms of material andthe minimum is about two hundred and fifty kilograms. It is uneconomicalfor a plant to make test batches with such a mill since there is therisk of losing at least two hundred and fifty kilograms of material.

Applicants capacity reduction tank ofiers a solution for this problem bypermitting the mill to disperse batches of material of as low asthirty-five kilograms, thus materially widening the usefulness of themill.

The essential novelty of applicants device resides in the provision of atank of considerably less capacity than that of the dispersion milltank, and which can be so mounted in the main tank that the dispersingmechanism of the mill will operate upon material in the smaller tank,and which is provided with a novel form of discharge valve whereby thetreated material can be evacuated from the device.

While I have illustrated in the drawings and herein after fully describeone specific embodiment of my invention, it is to be distinctlyunderstood that I do not consider my invention to be limited to saidspecific embodiment, but refer for its' scope to the claims appendedhereto.

In the drawings:

Fig. 1 is an elevation of the main tank, a portion thereof being brokenaway to show the capacity reduction tank mounted therein.

Fig. 2 is an enlarged top plan of the reduction tank, a portion of itsupper part being broken away to show its bottom.

Fig. 3 is a vertical section on the line 33 of Fig. 2, in the directionof the arrows.

Fig. 4 is a side elevation exploded view of the discharge valve shown insection in Fig. 3.

As shown in the drawings, the main tank T has a bottom 1 with a centralcircular opening 1a which is closed by a removable plate 2 fastened tothe bottom 1 by bolts 3, a sealing gasket (not shown) is put between thebottom 1 and the plate 2 to seal the joint. Suitably mounted on theplate 2, to be positioned in the tank 1, there is a stator 5 and rotor 6with drive pulley 6a for dispersing material in the well-known manner.The tank T has a discharge pipe 7 in its bottom 1, on which is threadeda collar 7-a exteriorly of the tank T, the porpose of which will bepresently explained. The tank T may have a suitable removably mountedcover (not shown).

I will now describe the structure of my improved reduction tank R foruse in the tank T.

The tank R has an outer jacket 8 and an inner cylindrical wall 9 toprovide a cooling chamber C for circulation of water about the tank R.Water is admitted through a flexible pipe 10 and discharged through aflexible pipe 11, entering the tank R at its top. The pipe 10 has aportion 10-a extending from the top to the bottom of the tank R so thatthe incoming cooling water is supplied to the lower end of the chamber Cadjacent the stator 5 and rotor 6, and rising in the chamber C isdischarged through the pipe 11 at the top of the chamber C.

A suitable cover 12 is provided for the tank R and handles 13 formanipulation of the tank R.

The tank R has a bottom 14 with a central circular opening 14-acorresponding in diameter with the opening l-a in the bottom 1 of themain tank T. There is provided for tank R a discharge pipe 15 passingthrough the bottom 14.

As clearly shown in Fig. 3, the tank R is mounted in the tank T byregistering the openings 1-a and 14-a, the tank R passing downwardlyinto the tank T, about stator 5 and rotor 6, and discharge pipe 15 beingreceived in discharge pipe 7. The bolts 3, having been removed to permitplacing the tank R, are then passed through registering bolts holes inthe bottom 14 of the tank R and the bottom 1 of the tank T. When thesebolts 3 are secured, the tank R is in operative position.

The discharge pipe 15 has .on its upper end flush with the top surfaceof the bottom 14 of the tank R a valve seat 15-a.

It is to be understood that the main tank T has a suitable valve (notshown) for controlling the discharge of material from the tank T throughthe pipe 7.

When this valve has been removed, a valve member 16 with a stem 16-11 isinserted into tank R, the member 16 seating on seat 15a and the stern16-a extending downwardly through pipes 15 and 7.

A discharge pipe 17 is then coupled to collar 7-a by bolts 7-b. Thispipe 17 has an angular part 18 which can be attached to any suitableconduit (not shown) to carry off the discharged material. A- bore 18a isprovided in part 18 coaxial with pipes 7 and 15, through which stern16-a passes. The pipe 17 has a depending sleeve 19 co-axial with thestern 16-a and having a closure plate 19-a in its lower end. Suitablythreaded in the plate 19-a is an adjusting nut 20 having a knurledhandle 20-a outside of sleeve 19 and a central bore 20-12. The part 18has an abutment 18-b about the bore 18-11 and within the sleeve 19. Anexpansion spring 21 bearing on the top of nut 20 biases a washer 21-aagainst the abutment 18-b to seal the bore 18-a. A cotter pin 22 passesthrough a bore 20-c in the nut 20 and a bore 16-h in the stem 16-a, tofix the nut 20 on the stern 16-a.

From the foregoing description of the details of construction of myimproved capacity reduction tank, its use and operation is obvious.Manipulation of the handle 20-a of the nut 20 adjusts the valve member16 relative to the valve seat 15a, to open and close the discharge pipe15.

When the tank R has been seated in the tank T, as above described, andthe pipe 15 has been closed by seating valve member 16 on the valve seat15-a, the top 12 is moved to open position (Fig. 3), and the tank R ischarged with the material to be dispersed by action of Patented July 16,1957 stator 5 and rotor 6, now within the tank R. The top 12 is closedand the mill is operated in the usual manner. The dispersed material canbe evacuated from the tank R through the pipe 15 within; the pipe 7 oftankT,v and.

discharged through the pipe 17 and its part 18, by opening pipe 15 bymoving the valve element 16 off of the seat 15-a.

Having described my invention, what I- claim is:

1. In a capacity reduction tank, for a dispersion mill having a maintank with a discharge pipe anda circular opening in its bottom and acircular plate to cover said opening, said plate carrying dispersionmechanism comprising a, stator fixed on the plate and in the main tankand a rotor in said stator, said plate and the bottom of the main tankhaving sets of registering bolt holes, re.- spectively, the combinationof a, reduction. tank so dimensioned as to have a lesser capacity thanthe main tank and to be disposed in the main tank, said reduction tankhaving a circular opening in its bottom of the same diameter as theopening in the bottom of the main tank and having a series of bolt holesregistering with those in the plate and the bottom of the main tank, anda set of bolts received in said bolt holes, whereby the parts can bealternatively related to dispose the dispersion mechanism in the maintank when the reduction tank is not disposed in the main tank, and todispose said mechanism in the reduction tank when the reduction tank isdisposed in the main tank, respectively.

-2. The structure defined by claim 1, having a discharge pipe on thereduction tank passing through said discharge pipe in the main tank,With a valve seat in said reduction tank, a valve member co-acting withsaid seat to open and close the reduction tank discharge pipe, and astem on said member passing through said discharge pipe of the reductiontank and extending outside of the main tank when the reduction tank isin the main tank.

References Cited in the file of this patent UNITED STATES PATENTS

